199? Or mint? Penny lots of era's both sides and looks like it's been struck by dime?

Against my better judgement I will go ahead provide the details you lack. Think through the minting process and then come up with a plausible way this coin could be produced from the mint.

Every part of the coin that is raised, like the numbers/rim/bust, were created from a portion of the die that is recessed. The die has those devices in recess, does that make sense? Every portion of the coin that is sunk in, like the fields of a coin, are struck from raised portions on the die, so the fields correspond to the highest places on a die. Now that we have those basics out of the way we can work on your coin.

Let's assume it came from the mint this way. You have a circular area around the edge of the coin, on both sides, that is sunken in well below the fields. This would correspond to the absolute highest part of the dies that struck the coin. Note that on the die that struck your coin, this high point would correspond to what is normally the lowest point, the part of the recessed die that creates the raised rim, which is the highest point on the coin, this is so they can be stacked. So, if your coin is real, the mint instead of making the rim of the die the lowest point, they added material to make it the highest point? Impossible.

Secondly, if the die has high points around the rim of the obverse and reverse die such that they make your coin, than that portion of the coin is being struck with a much higher pressure than is normally experiences. Metal flows when put under that kind of pressure, especially because the rim of planchets is upturned to compensation for the normal recess of the die on the rim. You would see a large bulge inside the fields by the rim, but that's not present on your coin. Again, without that evidence of higher pressure it's not possible this came from the mint.

This type of analysis is the starting point for me with every potential error coin I come across. How could it have left the mint that way. In most cases, it's impossible, as with your coin. It's post mind damage. As to why someone would do it, I have no idea. If you hang out here for a couple years you will see untold number of coins that people have messed around with in similar ways.